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Finding the Fourth Proportional to 18,802.72, 28,174.41 and 6,940.17

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Solution

The fourth proportional to 18,802.72, 28,174.41 and 6,940.17 is: 10,399.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.72 : 28,174.41 = 6,940.17 : x
  2. Step 2: Convert to fraction form
    18,802.72/28,174.41 = 6,940.17/x
  3. Step 3: Cross multiply
    18,802.72x = 28,174.41 × 6,940.17
  4. Step 4: Simplify right side
    18,802.72x = 195,535,195.05
  5. Step 5: Solve for x
    x = 195,535,195.05/18,802.72
  6. Step 6: Final answer
    x = 10,399.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.